JP2001254348A - Automatic polishing method for bedrock testing surface and automatic polishing device for bedrock testing surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic polishing method and its device capable of sanitarily carrying out work and automatically forming a bedrock testing surface without taking any labor for forming the bedrock testing surface in a site even when a surface to be polished is a soft rock. SOLUTION: The automatic polishing method of the bedrock testing surface is so constituted that the bedrock testing surface is automatically polished with a polishing disc to form the finished surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically polishing a rock test surface and an apparatus for automatically polishing a rock test surface.

[0002]

2. Description of the Related Art Dam construction, underground structure design, etc.
It is necessary to investigate mechanical properties such as strength and deformation characteristics of rock.

[0003] Therefore, in order to determine the strength and deformation characteristics of the rock, it is required to carry out a rock test on site, and it is required that the rock test surface be finished flat according to the standards of the Society.

Conventionally, the formation of the rock test surface has been performed manually by using a hammer, drill, and grinder for excavation and a polishing machine for polishing, and much labor is required to reach a standard test surface. In addition, it is mainly used for test pits where work is narrow, and there are many problems of hygiene and safety such as generation of dust.

To solve this problem, Japanese Patent Laid-Open No.
No. 317360, "A method for automatically forming a rock test surface and a device for automatically forming a rock test surface" has already been proposed.

[0006]

The apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 10-317360 developed as a polishing apparatus for hard rock is
Since the rock to be formed is hit, the surface to be polished may be damaged if the surface is soft rock, which may affect the quality of the test surface and cannot be used. In addition, the work efficiency is poor, and the work becomes dusty, so there is a problem in the work environment.

[0007]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention does not require labor for forming a rock test surface on site even when the surface to be polished is soft rock. Can,
In order to automatically form the test surface of the rock, the test surface of the rock was automatically polished with a polishing disk to form a finished surface.

In order to provide an apparatus for automatically forming a test surface of soft rock, the present invention provides a polishing head having a polishing disk, a feed mechanism for pressing the polishing disk against the rock test surface, and a polishing mechanism for the polishing disk. A rock test surface automatic polishing apparatus equipped with an automatic adjustment mechanism capable of automatically adjusting the rotation speed, the revolution speed, and the feed speed, and configured to automatically polish the rock test surface.

Further, the present invention detects a rotational load of a polishing disk for polishing irregularities on a rock test surface, and determines a rotation speed, a revolution speed, and a feed speed according to the rotational load in order to perform efficient polishing. An automatic grinding apparatus for a rock test surface was automatically adjusted to set an optimum value.

[0010] Furthermore, the present invention provides an apparatus for automatically polishing a rock test surface provided with a mechanism capable of automatically adjusting a polishing amount of a polishing disk in three stages of rough cutting, medium cutting and fine cutting.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to specific embodiments shown in the accompanying drawings.

FIG. 1 shows a state in which an automatic polishing apparatus for a rock test surface according to the present invention is disposed in a tunnel 1 indicated by a two-dot chain line. 1 and 2, a feed mechanism 4 for pressing against the rock 3 is supported on the upper part of the support leg 2, and a reaction force fixing section 6 provided with a manual screw jack 5 is provided at a rear end of the feed mechanism 4. .

On the other hand, a polishing head 9 having a polishing disk 8 is provided in front of the feed mechanism 4. In addition, a polishing-side fixing claw 10 is provided at the tip of the machine frame 36 including four fixing frames 79 arranged in parallel.

In order to form a test surface on the rock 3, first, the apparatus is fixed with the reaction force fixing portion 6 and the polishing-side fixing claw 10, each tip of which is inserted into the rock 3 and stretched.
Then, the test surface is polished.

FIG. 3 shows the details of the feed mechanism 4. An output shaft in which a feed servomotor 22 is housed in a casing 21 and fixed to an inner wall 23 thereof, and a bearing case 25 in which a bearing 24 is press-fitted is fixed to the inner wall 23 and a rolled ball screw is engraved on the outer periphery. 26 is press-fitted into a bearing 24, and the base is connected to an output shaft 27 of the feed servomotor 22 by a coupling 28. On the other hand, the output shaft 26 is
9 and screwed into a ball screw 31 fixed to the partition wall 30.
Base flange 33 of outer cylinder 32 externally fitted to inner cylinder 29
Is fixed to the inner wall 23 of the casing 21, a sliding key 34 is fixed in the axial direction of the outer peripheral surface of the inner cylinder 29, and is slidably fitted in a guide groove 35 on the inner surface of the outer cylinder 32 facing the sliding key 34. .

When the feed servo motor 22 is driven, the rotation of the feed servo motor 22 is transferred from the ball screw 31 screwed into the output shaft 26 to the inner cylinder 2.
9 and the inner cylinder 29 has its sliding key 34
, The inner cylinder 29 advances and retreats with respect to the outer cylinder 32, and is fixed to the flange 39 of the inner cylinder 29 guided by the machine frame 36, so that the polishing head 9 moves left and right in the figure. Reference numeral 37 indicates the outer cylinder 3
The bellows are fixed to the front end flange 38 and the outer peripheral surface of the inner cylinder 29 and provided to prevent dust from entering between the outer cylinder 32 and the inner cylinder 29.

As shown in FIG. 1, the polishing-side fixed claw 10
The handle 37 is protruded from the fixed frame 79 of the machine frame 36 by screwing, and screwed with a nut 38. The polishing-side fixing claw 10 is turned into an appropriate length by rotating the handle 37 and is fixed into the rock 3 by a nut 38.

On the other hand, a reaction force fixing portion 6 is provided on the other end side of the feed mechanism portion 4, and a manual screw jack 5 there is provided so that the opposing rock can be hardened.

Next, a mechanism for rotating the polishing disk 8 of the polishing head 9 and a mechanism for revolving the polishing disk 8 will be described with reference to FIG.

The polishing head 9 is provided with a mechanism for rotating the polishing disk 8 in the casing 53 and a mechanism for revolving the polishing disk 8.

The rotation servomotor 52 is connected to the casing 5.
A sprocket 56 fixed to a rotating plate 54 at the front opening of a casing 53 rotatably provided with respect to the shaft 3 and fixed to an output shaft 55 is connected to a sprocket 58 provided at a base end of a rotating shaft 57 for driving the polishing disk 8. Timing belt 59
Drive through. Further, a fountain nozzle 67 is opened at the center of the polishing disk 8, and this fountain nozzle 67 communicates with a water supply hose.

A revolving servomotor 60 is accommodated in the casing 53 by being connected to the rotating plate 54 and arranged on the outer periphery. A gear 62 fixed to the output shaft 61 is provided in the casing 53.
3 meshes with the internal gear 63 fixed to the lid plate 64 attached to the front opening. The polishing disk 8 provided so as to protrude from the cover plate 64 is covered with an elastic cover 65 so that the polished dust is not scattered. Reference numeral 66 denotes a cross roller bearing. Therefore, when the rotation servomotor 52 is driven, the polishing disk 8 is rotated. When the revolution servomotor 60 is driven at the same time, the polishing disk 8 is revolved at the same time while rotating, and as shown in FIG.

In order to make the polishing disk 8 tiltable, a horizontal shaft 68 is protruded from both sides of the feed mechanism 4, and the horizontal shaft 68 is swingably supported by the support leg 2.

According to the present invention, in forming a test surface required for a rock (soft rock) test, a rock surface of high quality with high smoothness is automatically obtained.

The polishing disk 8 is fed to the surface to be polished of the rock 3 by the feed servo motor 22 as described above, and is rotated by the rotation servo motor 52 to rotate.
It is revolved by 0, and is polished in a circular seat shape as shown in FIG.

The feed speed, rotation speed, and revolution speed of the polishing disk 8 are influenced by the rotational loads of the feed servomotor 22, the rotation servomotor 52, and the revolution servomotor 60. A device was installed to find the optimal set value according to the rotational load.

The rotational load is detected by the rotation servomotor 52 and fed back to the revolution speed and the feed speed of the polishing disk 8 to adjust the respective speeds appropriately. In the rotation of the polishing disk 8, a signal for maintaining the rotation speed is sent to the rotation servomotor 52 because the ground area of the polishing disk 8 is large in a flat portion having no unevenness, and the rotation speed of the polishing disk 8 decreases to lower the polishing efficiency. When a load is applied to the revolution servomotor 60, the revolution speed of the polishing disk 8 is reduced from the viewpoint of motor protection, and when the load is small, a signal for increasing the speed is sent to the revolution servomotor 60. The feed speed of the polishing disk 8 sends a signal similar to the revolution speed to the servo motor 22. Thus, appropriate polishing by the polishing disk 8 is enabled.

The rotational load of the polishing disk 8 for polishing the unevenness of the test surface of the rock was detected, and the speed was set according to the rotational load.

The above will be described in more detail.

FIG. 6 shows a layout of the apparatus in the operation panel.

The operation panel 71 has a sequencer (controller for sequentially proceeding the operation program) 72 and a leak sensor amplifier (a cutting water pipe is built in the polishing head 9 to detect if a water leak occurs. Sensor amplifier to rotate 73, rotation motor driver (sequencer 72
, Which controls the drive of the rotation servomotor 52 and feeds back the grinding load to the sequencer 72, and the revolution motor driver (receives the signal from the sequencer 72 to control the drive of the revolution servomotor 60). Controller 75, a feed motor driver (a controller that receives a signal from the sequencer 72 and controls the drive of the feed servo motor 22) 76, and supplies a DC power supply 77 to the polishing apparatus main body 78 with the rotation speed, the revolution speed, and the feed speed. The three servo motors 52, 60, and 22 having a high speed are provided so that efficient polishing can be obtained.

Maintenance of the Number of Revolutions of the Polishing Disk 8 When a rotational load is applied to the rotation servomotor 52 in the polishing step, the number of revolutions of the polishing disk 8 decreases, and the polishing efficiency deteriorates. In order to prevent such a state, a rotation motor driver 75 that receives a signal from the sequencer 72 in the operation panel 71 and controls the driving of the rotation servo motor 52 is provided so that the rotation speed of the polishing disk 8 is automatically maintained. Set.

Adjustment of the revolving speed of the polishing disk 8 A device for automatically adjusting the revolving speed according to the load of the rotation servomotor 52 is provided. Revolution speed value "high speed""mediumspeed"
In order to set three speeds of “low speed”, the rated load factor of the revolution servomotor 60 is input to the sequencer 72 in the operation panel 71. When the rotation load of the revolution servomotor 60 is small, the rotation speed of the revolution servomotor 60 enters the “high speed”. As the rotation load of the revolution servomotor 60 increases, the speed automatically changes from “medium speed” to “slow” to obtain efficient polishing. A revolving motor driver 75 that receives the signal from the sequencer 72 and controls the driving of the revolving servo motor 60 is set.

Adjustment of the feed speed of the polishing disk 8 An apparatus for automatically adjusting the feed speed according to the load of the rotation servomotor 52 is provided. The setting of the grinding amount of the polishing disk in three stages of rough cutting, medium cutting, and fine cutting and the rated load factor of the feed servo motor 22 are input to the sequencer 72 in the operation panel 71. When the rotational load of the feed servo motor 22 is small, the feed speed of the “high speed” is entered. As the rotational load of the feed servo motor 22 increases, the feed speed automatically changes from “medium speed” to “slow”, thereby increasing the efficiency. A feed motor driver 76 that receives a signal from the sequencer 72 and controls the drive of the feed servo motor 22 is set so that polishing can be obtained.

Further, an operation flow of an example of the present apparatus is shown in FIG.
・ See 8 ・ 9 ・ 10.

[0036]

As described above, the present invention provides a method for automatically polishing a rock test surface in which a test surface of the rock is automatically polished with a polishing disk to form a finished surface. Even in the case of soft rock, the formation of a rock bed test surface in the field does not require labor and can be performed hygienically, and the rock rock test surface is formed automatically.

In the present invention, the polishing time is reduced by eliminating the rough cutting step, and the cost is reduced.

The present invention also provides a polishing head having a polishing disk, a feed mechanism for pressing the polishing disk against a rock test surface, and an automatic adjusting mechanism for automatically adjusting the rotation speed, revolution speed and feed speed of the polishing disk. Since the apparatus for automatically polishing a rock test surface is provided to automatically polish the rock test surface, a device for automatically forming a soft rock test surface can be provided.

In the present invention, since the polishing is performed only by the polishing head, there is no need to replace the head, and the working process is simplified, and the process is shortened and the safety is enhanced.

Further, according to the present invention, the rotational load of the polishing disk for polishing the unevenness of the rock test surface is detected, and the rotation speed, the revolution speed, and the feed speed are automatically adjusted to the optimum values according to the rotation load. Since the above-mentioned automatic polishing apparatus for the rock test surface is used, efficient polishing can be performed.

Furthermore, the present invention provides an automatic grinding apparatus for a rock test surface equipped with a mechanism capable of automatically adjusting the polishing amount of a polishing disk in three stages of rough cutting, medium cutting, and fine cutting. Can provide surface.

[Brief description of the drawings]

FIG. 1 is a front view of an automatic polishing apparatus for a rock test surface according to an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a sectional front view of a feed mechanism of the automatic rock test surface polishing apparatus of the present invention.

FIG. 4 is a cross-sectional front view of the polishing head of the automatic rock test surface polishing apparatus of the present invention.

FIG. 5 is a diagram showing a state in which a test surface is formed by a polishing disk.

FIG. 6 shows an operation panel layout of the present invention.

FIG. 7 is a diagram showing a relationship between FIGS. 8, 9 and 10;

FIG. 8 is a diagram showing a front part of an operation flow chart of the automatic grinding apparatus for a rock test surface according to the embodiment of the present invention shown in FIG. 1;

9 is a diagram showing a middle part of an operation flow chart of the automatic grinding apparatus for a rock test surface according to the embodiment of the present invention shown in FIG. 1;

10 is a diagram showing the rear part of the operation flow chart of the automatic grinding apparatus for a rock test surface according to the embodiment of the present invention shown in FIG. 1;

[Explanation of symbols]

 3 rock bed 8 polishing disc 4 feed mechanism 9 polishing head

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Tatsuo Katayama 2-18-18 Honjo Higashi, Kita-ku, Osaka Kanden Kogyo Co., Ltd. F-term (reference) 2D043 AA00 AC01 BA10

Claims (4)

[Claims] 1. A method for automatically polishing a rock test surface, wherein the test surface of the rock is automatically polished with a polishing disk to form a finished surface. 2. A bedrock comprising a polishing head having a polishing disk, a feed mechanism for pressing the polishing disk against a rock test surface, and an automatic adjusting mechanism for automatically adjusting the rotation speed, revolution speed and feed speed of the polishing disk. An automatic polishing device for rock test surfaces that automatically polishes test surfaces. 3. A rotation load of a polishing disk for polishing irregularities on a rock test surface is detected, and a rotation speed,
3. The apparatus for automatically polishing a rock test surface according to claim 2, wherein the revolving speed and the feed speed are automatically adjusted and set to optimal values. 4. The apparatus for automatically polishing a rock test surface according to claim 2, further comprising a mechanism capable of automatically adjusting a polishing amount of the polishing disk in three stages of rough cutting, medium cutting and fine cutting.